Skiopticon image from the Department of Photography at the Royal Institute of Technology. Use by Professor Helmer Bäckström as lecture material. Bäckström was Sweden's first professor in photography at the Royal Institute of Technology in Stockholm Illustrerarch convergence angles VPH etc. where V and H is respectively. Left and right eye and P, P1, P2, object points, which, on the right eye's retina, give cause for pixels P1 ', P' and P2 'and more info see: Bäckström, Helmer. Photographic manual. Other revised edition. Nature and Culture. Stockholm. 1948. p. 1086.

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Photo credit: © BTEU/TEKNISKA / Alamy / Afripics
License: Licensed
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